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(No Model.) 2 Sheets-Sheet 1.

O. I. SOHOONE. STONE CUTTING MACHINE.

No. 416,507. Patented vwewroz mocha n. PETERS. mwumo n w, Wnhinglon. ac

(No Model.) 2 Sheets-Sheet 2. O. I. SGHOONE.

STONE CUTTING MACHINE. No. 416,507. Patented Dec. 3, 1889.

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UNITED STATES PATENT OFFICE.

CHARLES I. SCHOONE, OF NEW YORK, N. Y.

STONE-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 416,507, dated December 3, 1889 Application filed August 22, 1889. Serial No. 321,615. (No model.) I

To all whom it may concern.-

Be it known that I, CHARLES I. SOHOONE, a citizen of the United States of America, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Stone -Outting Machines; and 1 do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable'others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

My invention has reference to stone-outting machines, and is designed more especially for cutting stone to form a series of cubes or squares which, when assembled in a certain number, will form a paving-tile of highly-ornamental appearance as well as durable character.

.To these ends my invention consists in the improved construction, hereinafter described a; of Fig; 2.

and set "forth, whereby the stone is evenly measured and adjusted and cut in a positive and even manner.

In the accompanying drawings, forming part of this specification, Figure 1 is a front elevation of a machine embodying my improvements. Fig. 2 is a plan view. Fig. 3 is a side view of the upper portion of the same, and Fig. f is a vertical section on the line to Figs. 5 and 7 show different forms of gages, and Fig. 6 is a detail plan view.

The main or supporting portion of the machine consists of a vertical hollow standard A, square in cross-section and having an opening a, in its rear and at its base for the insertion and withdrawal of a drawer or receptacle B. At its top said standard is provided with side brackets b, which support shelf-sections 0 0, intermediate of which at the rear is a horizontal bed 0, upon which the gages are located. Two brackets c c are located on the front of the standard, and each carries upon its upper horizontal edge a longitudinal leaf-spring D, the ends of which are slotted for the passage of securing-screws cl, engaging said bracket, each of said leafsprings being convexed at its center to provide a yielding support for the feeding-plate D at the front of the machine. By reference to Fig. 4 it will be noted that the springs D are so located relatively upon the brackets that their curved portions will serve to tilt the rear transverse edge on a slight incline.

Vertical guides e e are located in pairs on the standard at each side thereof, and are connected together at their top by means of a cross-head 0, provided with a horizontal slot 6 extending from front to rear. The rear guide of each pair is braced by a vertical standard 6 of the form shown in Fig. 3, which standards also serve as the side walls for the space in which the gages are located.

011 the inside of the front of the standard is secured a transverse knife E, the edge of which projects above the front edge of the tically to the rear guide of each pair against which the adjacent arm F bears. An opening square in cross-section in each side shelf permits the passage of the adjacent arm therethrough belowsaid shelf. As seen most clearly in Fig. 4, the block f is preferably cut away to form a bearing-seat in which the upper knife E is bolted. Aloop-strap F passes through the slot in the cross-head and in the cross-block.

A longitudinal dovetailed groove 9 is formed longitudinally in the gage-supporting plate of the machine, and is adapted to receive the dovetailed projection g on the under side of the base 9 of the gage-carriage G to permit longitudinal sliding movement. A block g is rigidly secured at the rear of the gage-plate and projects above the upper face for a slight distance to furnish a bearing for a threaded longitudinal shaft 9 the rear projecting end of which carries a hand wheel or crank for its convenient rotation, while its inner end engages'but rotates in the rear part of the base 9 The base g of the carriage is rovided at its front with a vertical portion g, which carries centrally in its front face avertical dovetailed groove g", adapted to receive the vertical dovetailed rib h on the rear of the vertical part of a removable gage II, carrying on its bottom a metallic plate 7L2, against which the stone is adapted to bear. The front part of the gage carries at its top a rearwardlyextending horizontal car it", provided with a vertical threaded horizontal perforation for the passage of a vertical threaded rod h the lower end of said rod being headed to loosely engage a recess therefor in the vertical portion of the carriage, so that the revolution of the rod will cause the gage to be elevated or depressed relative to its carriage.

A shaft I passes transversely through the supporting-standard, near the front thereof, and has keyed thereto at each side a cam i, which as the shaft is rotated is adapted to bring its curved face into contact with the depending portion of the arm of the upper knife-frame. The projecting portion of the shaft adjacent to each cam has connected thereto a contracting-spring e", the other end of which is connected to the adjacent depending portion of the arm.

The feed-plate rests upon the upper edges of the front standards, and is cushioned upon the springs thereof, as previously explained, and said feed-plate has formed therein a curved segmental slot j, relative to which is located in one corner of the feed-plate a pin j, to which is pivotally connected one end of a bar K, adapted to control the position in which the material is fed to the cuttingknives. The free end of the bar K is pierced by a bolt to engage said slot.

The shaft I carries at one side a band-pulley and a hand-crank. A treadle K is pivoted transversely at the front of the standard A, and carries at one side a pitman k, which has pivotally connected to its outer end a link, the other end of which is pivotally connected to a crank formed in a second transverse shaft, the adjacent end of which car ries a band-pulley to enable it to be belted to the band -pulley previously mentioned, while the projecting end at the opposite side carries a band-pulley to enable the shaft to be driven from a suitable motor, while a large balance-wheel is located adjacent.

From the description immediately preceding it will be obvious that the machine may be operated either by hand through the medium of the crank, by foot by the treadle, or from a suitable engine. v In the event of the employment of a motor-power it will be desirable to disconnect the pitman-and-link connection with the crank-shaft, so that the treadle may not be unnecessarily vibrated. To conveniently provide for such disconnection, the upper end of the link is bifurcated to embrace the crank, to which it is connected by means of a pin passed through the bifurcated portion.

In operation the gagecarriage with its gage is adjusted to limit the rearward feed of the stone and thus define the size of the sections to be cut. ly having the rear end of the feed-plate slightly elevated through the medium of its spring the stone is normally positioned above the lower knife and can in no manner injure its edge. The shaft being rotated, the cams will elevate the upper knife and its frame, and as the cams clear the arms the springs combined with the weight of the frame will cause the knife to descend with a quick, sharp, and decisive stroke, and resulting in the feed-plate being compressed upon its cushions, so that the edges of both knives conjointly operate to sever the section. By using the springs, as stated, I am enabled to secure a stroke of great power and do not need to use a knife-frame of any great weight, thereby avoiding a cumbersome structure and securing a quick sharp blow. As the sections are detached they drop into the receptacle located in the base of the standard. The movement of the bar on the feed-plate determines the relative angle at which the material is presented to the knives.

As shown in Fig. 5, a gage is provided that may be used in the event of a necessity for cutting sections into a triangular shape, the lower metallic plate secured to the gage being in the form of a triangular recess. The loop that engages the crosshead and block f serves as a limiting means to so limit the descent of the upper knife that the edges of the knives cannot contact, thus adding to the sharp decisive eifect previously referred to as being desirable, and enabling the stone to be evenly split into the desired sections.

In Fig. 7 the gage is shown as provided with a movable edge pivoted at one end and adjustably connected at the other by a curved bar 1, slotted for the passage of a securingbolt.

I clain1- 1. The combination, in a stone-cutting machine, of a supportirig-standard, a vertical guide-frame mounted upon the same, a lower fixed transverse knife, an upper transverse knife sliding vertically in said guide-frame and having extensions, a shaft carrying cams adapted to contact with and elevate said extensions and upper knife, and springs connecting said extensions with a fixed portion of the machine and adapted to eifect the spring-retraction of the upper knife when the cams clear the extensions, substantially as set forth.

2.- The combination, in a stone-cutting machine, of a support, a lower fixed knife, vertical guide-frame, and upper movable knife therein, connections for elevating said movable knife, spring-connections for retracting the latter, and a feed-plate having its inner portion tilted upon spring-cushions, substantially as set forth.

3. The combination, in a stone-cutting machine, of a supporting-standard, a vertical guide-frame mounted upon the same, a horizontal transverse knife sliding vertically in said guide-frame and having extensions, a lower transverse fixed knife and feed-table having a pivoted bar and located in substantially the same plane with the lower fixed knife, a shaft carrying cams adapted to contact with said extensions to elevate said upper knife, and springs connecting said extensions with fixed portions of the machine for efiecting the spring-retraction of the upper knife, substantially as set forth.

4. The combination, in a stone cutting machine, of a supporting-frame, movable knife, and connections for reciprocating the same, and a longitudinally-adjustable carriage in the rear of said knife and a vertically-adjustable gage mounted therein, substantially as set forth.

in presence of two witnesses.

CHARLES I. SOHOONE.

Witnesses:

JOHN PICKL, GUISIPPE RoBINI. 

